Habeisost hayes



UNITED STATES PATENT OFFICE.

HARRISON HAYES, OF PORTLAND, MAINE.

TUBE-EXPANDER.

SPECIFICATION 'forming part of Letters Patent No. 325,244, datedSeptember 1, 1885.

(No model.)

o all whom it 'may concern:

Be it known that I, HARRISON HAYES, a citizen of the United States,residing at Portland, in the county of Cumberland and State oi' Maine,have invented a new and useful SteanrBoiler-Tube-Fastening Tool, ofwhich the following is a specilication.

My invention relates to improvements in steam-boilertube-fasteningtools, in which three or more single rolls are used to fasten the tubein the tube-sheet of steam-boilers; and the object of my improvement isto form a shoulder each side ol' the tube-sheet and at the same timeforce the tube rmly against the tubesheet between the shoulders, so asto produce a fastening stronger and better' than can be obtained by theuse of a tooll with sin gle rolls. I attain this object by the use ofthe tool illustrated in the accompanying drawings, in which- Figure l isa side View of the tool; Fig. 2, an end view of the same; Fig. 3, asectional View on the line df, Fig. l. Fig. 4 is a view of the head ofthe mandrel; and Fig. 5, a sectional View ofthe tool on the line g h,Fig. 2, and of a tube and tube-sheet after being fastened.

Similarletters refer to similarparts througlr out the several views.

A represents the stock of the tool, in one end of which are three slotsat equal distances from each other, and each of which contains threehardened steel rolls, a b c, of varying diameters and lengths, accordingto the size of the shoulders required and the thickness of thetube-sheet. a and c are slightly larger in diameter than the roll b, andthe length of b is proportioned to the thickness of the tubesheet.

The three slots in which the rolls a I) c are placed are elongated, sothat the rolls have a little motion forward and back from the center,but cannot fall from the slots laterally. They are put in the slots atthe end and held in place by the ring D, which is fastened to the stoel:A by the machine-screws e e e.

B is a tapering mandrel to be driven into the central hole of the stockA, so as to iorce the rolls a b c into position to fasten the tube. Saidmandrel is provided with holes, as at F, Fig. et, in its largest end, inwhich to insert a rod for the purpose of revolving the tool andcompleting the fastening.

The operation of this tool is as follows: The stock A, Fig. 5, is placedin the end of the tube C, so that the rolls Z1 b-b shall be opposite thetube-sheet E, the tapering mandrel is then driven into the stock A untilthe rolls b I) b are pressed firmly against the tubesheet E and therolls a a e c e c have formed a shoulder each side of the same, then arod is pnt in the hole F, Fig. et, and the whole revolved, forming astrong, even fastening, as shown. The advantages of these sets of rollsce a a b Z b c c o over single rolls are greater strength in the tooland a better fastening of the tubesfgreater strength because of threeshort bearings on the mandrel, instead ofl one long one, and abetterfastening because of the shoulder each side of the tube-sheet.

Having fully described my invention, what I desire to claim and secureby Let-ters Fatent is- The combination, in a steam boiler tube fasteningtool, of three ormore sets of rolls, a b c, in a stock, A,with atapering mandrel, B, having a hole or holes in its largest end for thepurpose of inserting a rod to revolve the tool, all as shown, described,and specified.

HARRISON HAYES.

'Witnessesz A. M. MILLETT, WILsoN SPRAGUE.

